35results about How to "Increased reactive sites" patented technology

The invention discloses a preparation method of a porous honeycomb ceramic catalyst with a high specific surface area. The porous honeycomb ceramic catalyst is prepared by taking titanium dioxide, montmorillonite and alpha aluminum oxide as carriers and ammonium metatungstate, ammonium metavanadate, cerium nitrate and palladium acetate as active components through mixing, aging, kneading, molding, drying and roasting under the accompanying of auxiliary materials, wherein the auxiliary materials comprise monoethanolamine, ammonia water, lactic acid, stearic acid, glass fibers, macromolecular polymer fibers, hydroxypropyl methyl cellulose, polyoxyethylene, citric acid and water. According to the preparation method of the porous honeycomb ceramic catalyst with the high specific surface area, the catalyst carriers are optimized in order to be adapted to application conditions of frequent temperature variation, high concentration of nitrogen oxides, high heat stability and high specific surface; the montmorillonite and the alpha aluminum oxide are used for replacing one part of the titanium dioxide, the montmorillonite has the enhancing effect and the aluminum oxide has the effect of high heat stability; and meanwhile, the macromolecular polymer fibers are used for replacing wood pulp so that a grinding tool is difficult to block in a production process and the production efficiency is improved.

The invention belongs to the technical field of material preparation and environmental catalysis, and specifically relates to a modified graphite phase carbon nitride and its preparation method and application. The modified graphite phase carbon nitride is prepared by copolymerization of urea and tetrabromobisphenol A obtained, wherein the content of bromine in the modified graphite phase carbon nitride is 0.1-0.5 wt%, and the modified graphite phase carbon nitride has a nano-layered structure. The modified graphitic carbon nitride provided by the present invention is applied in the desulfurization reaction. 2 In the S-selective reaction, the material showed good catalytic activity and selectivity, and also had certain activity for COS catalytic hydrolysis.

The invention discloses a metal oxide / polypyrrole hollow nanotube negative electrode composite material for a sodium ion battery and a preparation method for the composite material. The composite material is formed by enabling metal oxide nanoparticles to be uniformly grown on the inner walls and outer walls of the polypyrrole hollow nanotubes; the preparation method comprises the steps of slowly adding pyrrole monomers into a water solution containing methyl orange and an oxidizing agent in a dropwise manner under a water bath condition; carrying out an in situ polymerization reaction while stirring to obtain the polypyrrole hollow nanotubes; and enabling the polypyrrole hollow nanotubes to be dispersed into water, then adding a metal salt solution and uniformly mixing, next, moving the mixture into a high-pressure reaction kettle to be subjected to a hydrothermal reaction to obtain the composite material. When the prepared composite material is used as the negative electrode of the sodium ion battery, the prepared sodium ion battery has high charging-discharging specific capacity, high rate capability, high stable cycle performance and the like; and in addition, the composite material is simple in preparation method, low in cost and wide in industrial application prospect.

The invention discloses a composite cathode material for lithium ion / sodium ion batteries and a preparation method of the composite anode material. The composite cathode material is a tin selenide / carbon paper composite material which is obtained by electrochemical deposition with carbon paper serving as a working electrode and an aqueous solution of tin containing inorganic salt and lactic acid or sodium lactate. In the tin selenide / carbon paper composite material prepared according to the method, tin selenide nanoparticles are uniformly distributed on a carbon paper skeleton without adhesives and current collectors; the tin selenide / carbon paper composite material can be directly used as the cathode material for the lithium (sodium) ion batteries and has excellent flexibility and electrochemical performances.

Embodiments of the present invention relate to a bio-based nanomaterial and a preparation method thereof. The preparation method of the bio-based nanomaterial provided by the embodiment of the present invention comprises the following steps: after pulverizing the biological raw material comprising green plants, the shells of crustaceans, the organs of molluscs and / or the cell walls of fungi, disperse them in a mixture containing persulfuric acid The hydrolysis reaction is carried out in the aqueous solution of the root activation system and the advanced oxidation technology system to obtain a hydrolyzate; the hydrolyzate is post-treated to obtain bio-based nanomaterials; wherein: the persulfate activation system includes reagents containing persulfate and persulfate Sulphate radical activator; the advanced oxidation technology system includes hydrogen peroxide and a reagent for generating hydroxyl radicals from hydrogen peroxide. The method for preparing bio-based nanomaterials provided by the invention has high preparation efficiency, fast reaction rate and low preparation cost. The embodiment of the present invention also provides the bio-based nanomaterial prepared by the above method.

The invention relates to a direct carbon fuel cell anode with dual electric catalytic functions, and belongs to the technical field of clean energy. The anode material is prepared by compounding nanoparticle as a conductive phase on the inner and outer parts of transition element-codoped CeO2 as a catalytic active phase of the anode and a porous framework. The prepared anode material has dual electrocatalysis effects on carbon fuel, can be used as an excellent ion conductor, transfers O<2-> generated by a cathode to the electrode surface and increases the electrode reaction active sites; the anode material can be applied to electrochemical oxidation of an intermediate catalytic carbon; and the power output of the cell is improved. The anode material disclosed by the invention is assembled into a direct carbon fuel cell for power generation, so that the three-phase interface length is prolonged; the fuel gasification reaction rate is improved; corrosion of molten carbonate to an electrolyte is avoided; and the lifetime of the cell is prolonged.

The invention discloses a composite photocatalytic material with high-efficiency photocatalytic activity and a preparation method thereof. It is prepared by the method of self-assembly and copolymerization modification of precursors. The raw materials used are melamine and thiocyanate; the first catalyst material is Ag / Ag 3 PO 4 / BiPO 4 Composite material, the second catalyst material is CdS microspheres@TiO 2 Core-shell structure, the first catalytic material and the second catalytic material both have excellent photocatalytic activity and visible light utilization rate, and then the first catalytic material, the second catalytic material and the modified carbon nitrogen are compounded; The photocatalytic material is prepared by compounding the material, the second catalytic material and the modified carbonized nitrogen, which effectively improves the visible light utilization rate of the photocatalytic material, and the photocatalytic material has excellent reactivity and photocatalytic reaction efficiency, and has high practicability.

The invention discloses a high-efficiency electrode for treating industrial circulating cooling water and a preparation method thereof, which comprises Ti substrates, SnO 2 ‑Ce interlayer and SnO 2 ‑Sb‑Ru active layer, the electrode has the characteristics of high catalytic activity, high corrosion resistance stability, strong bactericidal ability and low energy consumption, and the preparation is relatively simple and the cost is low.

The invention discloses a tin selenide and tin oxide composite material and a preparation method and application thereof. The method comprises the following steps that a selenium-containing alkaline solution and a tin-containing acid solution are mixed according to the selenium-tin molar ratio of 1:1, heating is conducted to reach the temperature of 70-100 DEG C, stirring is conducted, reacting is conducted, precipitates obtained through reacting are washed, filtered, dried and calcined at 300-400 DEG C, and the tin selenide and tin oxide composite material is obtained. The tin selenide and tin oxide composite material serving as a sodium (lithium) ion battery cathode material has an excellent electrochemical property, the preparation method of the material is simple, the cost is low, and the material has a wide industrial application prospect.

The invention provides a g-C3N4 composite photocatalyst for fast degrading pollutants and a preparation method thereof. The g-C3N4 composite photocatalyst is prepared by using raw material g-C3N4 and a hydrogen peroxide solution. The g-C3N4 composite photocatalyst has strong visible light absorption ability and good photocatalytic property, and can fast degrade the pollutants in water.

The invention discloses an iron diselenide / sulfur-doped graphene anode composite material for a sodium-ion battery and a preparation method of the iron diselenide / sulfur-doped graphene anode composite material. The preparation method comprises the following steps: dissolving a sulfur source, a selenium-containing inorganic matter, an iron-containing inorganic salt and citric acid or sodium citrate into a graphene oxide solution; dropwise adding hydrazine hydrate to form a light black solution, adding the light black solution to a hydrothermal reaction kettle for reaction, and naturally cooling the product after the reaction is ended; and carrying out repeated washing, suction filtration and drying on a reaction sediment with distilled water and absolute ethyl alcohol, so as to obtain the iron diselenide / sulfur-doped graphene composite material. According to the iron diselenide / sulfur-doped graphene composite material prepared by the method, iron diselenide nano-particles are evenly distributed on the surface of the sulfur-doped graphene and the iron diselenide / sulfur-doped graphene composite material has excellent electrochemical properties as a sodium-ion battery anode material. The iron diselenide / sulfur-doped graphene anode composite material is prepared by a simple hydrothermal process; synchronous sulfur doping, graphene oxide reduction and graphene oxide and iron diselenide recombination can be achieved; and the iron diselenide / sulfur-doped graphene anode composite material is simple in preparation technology and low in cost, and has a wide industrial application prospect.